Team up or destroy each other.
Today, Bethesda shared more details about Fallout 76's Break-It Early Test Application (B.E.T.A). In order to play the game early, you'll have to preorder Fallout 76 and then redeem a code that comes with your purchase on the game's website. There doesn't appear to be any other way at the moment.
Full story from the WindowsCentral blog...